Feasibility of Growing Chlorella sorokiniana on Cooking Cocoon Wastewater for Biomass Production and Nutrient Removal
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The feasibility of microalgae cultivation using cooking cocoon wastewater (CCW) collected from a silk production factory was investigated in this work. Results showed that Chlorella sorokiniana grew well on the CCW whether it was autoclaved or not. After 7-day cultivation, the biomass increased by 1.57, 2.78, 3.33, and 3.14 times, and by 3.65, 4.03, 3.27, and 2.82 times when this alga was cultivated in the raw CCW (R-CCW) and autoclaved CCW (A-CCW) at the initial dry cell densities of 0.01, 0.04, 0.08, and 0.16 g/L, respectively. The algal photosynthetic growth was not affected when this alga grew on the R-CCW at an initial dry cell density of ≥ 0.04 g/L, while it was significantly inhibited when the initial dry cell density was 0.01 g/L. Additionally, this alga could remove nutrients rapidly from the CCW, and the removal efficiency increased with the increase of initial dry cell density. Thus, it was concluded that the CCW could be used as a good-quality medium for the algal growth, which is worthy of further study and promotion.
KeywordsChlorella sorokiniana Cooking cocoon wastewater Nutrient removal Chemical compositions Photosynthetic performance
This manuscript was supported by the Project of “Six Talent Peak” of Jiangsu Province (SWYY-025), the Qinglan Project of Jiangsu Province (2016), the Shenlan Project of Jiangsu University of Science and Technology (2015), and the China Scholarship Council (Grant No. 201802180064).
Compliance with Ethical Standards
Conflict of Interest
The authors declare that they have no conflict of interest.
The authors declare that there are no studies conducted with human participants or animals.
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